Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first node may transmit, to a second node on a beamformed link from the first node to the second node, a first signal, wherein the first node and the second node are associated with common timing; determine whether a second signal, based at least in part on the first signal, is received on a beamformed link from the second node to the first node; and transmit a third signal based at least in part on receiving the second signal or perform a sidelink beam failure recovery procedure based at least in part on determining that the second signal is not received. Numerous other aspects are provided.
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2. The first node of claim 1, wherein at least one of the first signal, the second signal, or the third signal comprise channel state information reference signals.
This invention relates to wireless communication systems, specifically improving signal transmission and reception in multi-node networks. The problem addressed is the need for efficient and accurate channel state information (CSI) feedback in wireless networks, particularly in scenarios involving multiple nodes and signals. The invention provides a system where a first node receives signals from other nodes, including channel state information reference signals (CSI-RS), to enhance communication reliability and performance. The first node is configured to receive a first signal from a second node, a second signal from a third node, and a third signal from a fourth node. These signals may include CSI-RS, which are reference signals used to estimate the channel conditions between nodes. The first node processes these signals to determine channel state information, which is then used to optimize signal transmission and reception. The system may also involve beamforming or precoding techniques to improve signal quality based on the CSI feedback. The invention ensures that the first node can accurately assess the channel conditions from multiple sources, allowing for adaptive adjustments in transmission parameters. This improves overall network efficiency, reduces interference, and enhances data throughput. The use of CSI-RS in the signals enables precise channel estimation, which is critical for modern wireless communication systems operating in dynamic environments. The system is particularly useful in scenarios where multiple nodes must coordinate transmissions to avoid interference and maximize performance.
3. The first node of claim 1, wherein the first signal, the second signal, and the third signal are associated with respective resource allocations that are known to the first node and the second node before transmission of the first signal.
4. The first node of claim 3, wherein the respective resource allocations are determined by one or more of the first node or the second node.
5. The first node of claim 3, wherein the respective resource allocations are determined by a base station associated with the first node or the second node.
6. The first node of claim 1, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
This invention relates to wireless communication systems, specifically improving efficiency in beamformed links between nodes. The problem addressed is the inefficiency in traditional systems where separate beamformed links are established for uplink and downlink communications between nodes, consuming additional resources and increasing latency. The invention describes a first node in a wireless network that communicates with a second node using a single bidirectional beamformed link. This link is shared for both transmitting and receiving data, eliminating the need for separate uplink and downlink beams. The beamformed link is established using directional antennas or phased arrays to focus energy between the nodes, reducing interference and improving signal quality. The system dynamically adjusts beam parameters, such as direction and strength, to maintain optimal performance under varying conditions. This approach conserves bandwidth, reduces power consumption, and minimizes latency by avoiding the overhead of managing multiple links. The invention is particularly useful in high-density networks, such as 5G or mmWave communications, where efficient spectrum utilization is critical. The bidirectional link may also incorporate error correction and synchronization mechanisms to ensure reliable data transmission.
7. The first node of claim 1, wherein the common timing is determined based at least in part on a base station associated with the first node and the second node.
A system and method for synchronizing timing between nodes in a wireless communication network, particularly in scenarios where nodes operate in different frequency bands or networks. The problem addressed is ensuring consistent timing alignment between nodes to enable efficient communication and coordination, especially when nodes are associated with different base stations or operate in heterogeneous network environments. The system includes a first node and a second node, each capable of communicating with at least one base station. The nodes are configured to determine a common timing reference based on the base station associated with both nodes. This common timing allows the nodes to synchronize their operations, such as data transmission, reception, or coordination, even if they are connected to different base stations or operate in different frequency bands. The synchronization process may involve exchanging timing information between the nodes or deriving the common timing from the base station's timing signals. This approach ensures reliable communication and coordination between nodes in diverse network conditions, improving overall network performance and efficiency.
8. The first node of claim 1, wherein the common timing is determined based at least in part on positioning systems of the first node and the second node.
9. The first node of claim 1, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
This invention relates to wireless communication systems, specifically improving sidelink communication between nodes using beamforming techniques. The problem addressed is the need for efficient and reliable direct communication between devices without relying on a central network infrastructure, particularly in scenarios like vehicle-to-vehicle (V2V) or device-to-device (D2D) communication. The invention describes a first node configured to establish a beamformed communication link with a second node, where both the uplink and downlink beamformed links between the nodes are associated with a ProSe (Proximity Services) sidelink interface. The ProSe sidelink interface enables direct communication between devices, bypassing the need for a base station or core network. The beamforming techniques enhance signal quality and reliability by focusing transmission energy in specific directions, reducing interference and improving link performance. The first node includes a transceiver for transmitting and receiving beamformed signals, a beamforming module to shape the transmission and reception beams, and a controller to manage the beamforming process. The beamforming module adjusts the beam direction and width based on channel conditions and device mobility, ensuring robust communication. The controller also handles synchronization and resource allocation for the sidelink interface, coordinating with the second node to maintain stable communication links. This approach is particularly useful in scenarios where devices need to communicate directly, such as in autonomous driving, emergency response, or industrial IoT applications, where low latency and high reliability are critical. The use of beamforming with ProSe sidelink interfaces improves spectral efficiency and reduces
10. The first node of claim 1, wherein the first node and the second node comprise user equipment.
A system and method for wireless communication involves user equipment (UE) devices operating in a network environment. The system addresses challenges in managing communication links between multiple UEs, particularly in scenarios where direct or relayed connections are required. The first UE and the second UE are configured to establish a communication link, either directly or through an intermediary node, to facilitate data transmission. The first UE includes a transceiver for sending and receiving signals, a processor for processing communication data, and a memory for storing instructions. The second UE similarly includes a transceiver, processor, and memory to support bidirectional communication. The system may also incorporate relay nodes to extend coverage or improve signal quality when direct communication is impaired. The UEs dynamically adjust transmission parameters, such as power levels or modulation schemes, to optimize performance based on environmental conditions. This approach enhances reliability and efficiency in wireless networks, particularly in dense or obstructed environments. The invention focuses on improving connectivity and data transfer between UEs while minimizing latency and resource consumption.
11. The first node of claim 1, wherein the first node and the second node comprise integrated access and backhaul nodes.
12. The first node of claim 1, wherein the one or more processors, when performing the sidelink beam failure recovery procedure, are configured to perform the sidelink beam failure recovery procedure based at least in part on failing to receive the second signal a threshold number of times.
This invention relates to wireless communication systems, specifically to sidelink beam failure recovery in device-to-device (D2D) or vehicle-to-everything (V2X) communications. The problem addressed is the unreliable recovery of communication links when beam failure occurs between devices, leading to dropped connections or degraded performance. The invention describes a first node in a wireless network that includes one or more processors configured to perform a sidelink beam failure recovery procedure. The recovery process is triggered when the node fails to receive a second signal from a second node a threshold number of times. The second signal is likely a reference signal or acknowledgment used to monitor the quality of the sidelink beam. The threshold ensures that recovery is only initiated after persistent failure, avoiding unnecessary overhead from transient issues. The recovery procedure may involve re-establishing the beam, switching to an alternative beam, or notifying a network entity to facilitate recovery. The system may also include additional components like antennas, transceivers, and memory to support these operations. The invention aims to improve reliability and reduce latency in sidelink communications by ensuring timely and conditional recovery of failed beams.
14. The second node of claim 13, wherein the one or more processors are further configured to transmit the second signal based at least in part on receiving the first signal.
This invention describes a "second node" participating in a sidelink beam failure recovery procedure. The second node, which could be user equipment (UE) or an integrated access and backhaul (IAB) node, communicates with a "first node" via a beamformed link, potentially a ProSe sidelink interface. The links between the nodes may be the same. The second node's processors are configured to perform a key step in this recovery process. Upon receiving a "first signal" from the first node, its processors transmit a "second signal" in response. Both the first and second signals, which may include Channel State Information Reference Signals (CSI-RS), utilize specific resource allocations known to both nodes prior to transmission. The first node relies on receiving this "second signal" to confirm link health; failure to receive it a threshold number of times indicates a beam failure, triggering recovery.
15. The second node of claim 13, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
This invention relates to wireless communication systems, specifically improving the efficiency and reliability of beamformed links between nodes. The problem addressed is the inefficiency and complexity of maintaining separate beamformed links for uplink and downlink communications between nodes, which can lead to increased latency, resource consumption, and synchronization challenges. The invention involves a second node in a wireless network that establishes a bidirectional beamformed link with a first node, where the same physical link is used for both uplink and downlink communications. This bidirectional link is achieved by configuring the second node to transmit and receive data over the same beamformed channel, eliminating the need for separate uplink and downlink beams. The second node includes a transceiver system capable of dynamically adjusting beamforming parameters to maintain the bidirectional link under varying channel conditions. The transceiver system may use techniques such as adaptive beamforming, beam tracking, or hybrid beamforming to optimize link performance. The second node may also include a synchronization module to ensure timing alignment between the first and second nodes, reducing interference and improving data throughput. By reusing the same link for both directions, the invention reduces overhead, simplifies beam management, and enhances overall system efficiency.
16. The second node of claim 13, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
19. The method of claim 18, wherein at least one of the first signal, the second signal, or the third signal comprise channel state information reference signals.
This invention relates to wireless communication systems, specifically methods for transmitting and receiving signals to improve communication reliability and efficiency. The problem addressed involves optimizing signal transmission in environments with interference or fading, where traditional methods may fail to provide accurate channel state information (CSI) or reliable data transmission. The method involves transmitting at least three distinct signals from a transmitter to a receiver. The first signal carries data, the second signal carries control information, and the third signal carries reference signals for channel estimation. At least one of these signals includes channel state information reference signals (CSI-RS), which are used to measure the channel conditions between the transmitter and receiver. The CSI-RS help the receiver estimate the channel state, allowing for better signal decoding and adaptive transmission techniques like beamforming or power allocation. The method further includes receiving these signals at the receiver, where the channel state is estimated using the reference signals. The receiver then processes the data and control signals based on this estimated channel state, improving signal quality and reducing errors. The use of multiple signals, including CSI-RS, ensures robust communication even in challenging environments. This approach enhances spectral efficiency and reliability in wireless networks, particularly in scenarios with dynamic channel conditions.
20. The method of claim 18, wherein the first signal, the second signal, and the third signal are associated with respective resource allocations that are known to the first node and the second node before transmission of the first signal.
21. The method of claim 18, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
22. The method of claim 18, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
23. The method of claim 18, wherein performing the sidelink beam failure recovery procedure further comprises performing the sidelink beam failure recovery procedure based at least in part on failing to receive the second signal a threshold number of times.
25. The method of claim 24, further comprising transmitting the second signal based at least in part on receiving the first signal.
26. The method of claim 24, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
27. The method of claim 24, wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
28. The method of claim 24, wherein the first node and the second node comprise user equipment.
29. The method of claim 24, wherein the first node and the second node comprise integrated access and backhaul nodes.
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January 12, 2021
October 25, 2022
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